Bitcoin will become global reserve currency

Pros

Cons

USD as a national currency can't fulfil its role as a global reserved money as good as truly independent currency such as Bitcoin

Bitcoin is a protocol, (an agreed way of doing things between two parties), which allows the transfer of value between two parties. In the same way as TCP/IP is the worldwide standard for transferring information, there is only a requirement for one worldwide standard way of transferring value.

Bitcoin is the only usable, store of value alternative to your local currency.

Bitcoin is a safer way of handling money than other options.

Remittence (money sent by immigrants to their families overseas) is a market that costs the world's poorest people ~$60 billion every year. The Bitcoin network replaces remittence services (westernunion.com) and helps those who need money the most. Use Western Union to send $1000 to Thailand, and it will cost you ~$1100! Bitcoin lets you do this for less than $1. To remove volatility, the receiving party can exchange their Bitcoin for a stable coin, to preserve the fiat value of the transaction.

Bitcoin is digital gold. Just with better properties in terms of transferability and storage.

With further modifications of the protocol, Bitcoin will become much more useful with more functions, and thus even more suitable to the role of a global reserved currency

Other cryptocurrencies are more suitable for the purpose

Bitcoin is too volatile (as of now)

Bitcoin is not in widespread use among B2B payments.

By its design, Bitcoin does not allow for scaling. The quicker transactions are processed in a decentralized manner, the less trustworthy they are, the more difficult it is to compete with legacy USD payments networks.

Bitcoin might not be able to scale to the desired throughput of transactions

Bitcoin's deflationary monetary policy might not be suitable to be a global reserved currency

The fact Bitcoin is not being backed by any government disqualifies it from the role of a reserved currency.

Anonymity in Bitcoin transactions might be the obstacle on its way to become global money.